Make rule 933100 RE2 compatible

Author: meetug

rules/REQUEST-933-APPLICATION-ATTACK-PHP.conf

@@ -43,9 +43,7 @@ SecRule TX:EXECUTING_PARANOIA_LEVEL "@lt 1" "id:933012,phase:2,pass,nolog,skipAf
 # Therefore, that pattern is now checked by rule 933190 in paranoia levels
 # 3 or higher.
 #
-# Not supported by re2 (?!re).
-#
-SecRule REQUEST_COOKIES|!REQUEST_COOKIES:/__utm/|REQUEST_COOKIES_NAMES|ARGS_NAMES|ARGS|XML:/* "@rx (?:<\?(?!xml\s)|<\?php|\[(?:/|\\\\)?php\])" \
+SecRule REQUEST_COOKIES|!REQUEST_COOKIES:/__utm/|REQUEST_COOKIES_NAMES|ARGS_NAMES|ARGS|XML:/* "@rx (?:<\?(?:[^x]|x[^m]|xm[^l]|xml[^\s]|xml$)|<\?php|\[(?:\/|\\\\)?php\])" \
     "id:933100,\
     phase:2,\
     block,\